Sionco is also a developer of educational apps mostly focused on learners of the English language.
Using my real-life experience as a language teacher I hope to create some useful apps to learn English.

Phonetic Submarine English language learning App - Apps to learn English

The first of my Apps to learn English.
Phonetic Submarine is a fun app for improving your listening comprehension in English.
See if you can distinguish the difference between similar words (minimal pairs) in English.
Available for Android users here.